good women drivers (in the sense that they know what their car can do) are rare because they are simply not interested in wheeled cubes of steel that take them to work and back, the majority of men on the other hand have a passion for them and so understand them better, and want to push their limits.
in my experience a woman is far less likely to get themselves in trouble when she is driving alone, she is more likely to be concentrating than gabbering carp to her mate.